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For PR1271:
Fix SingleSource/Regression/C/2003-05-21-UnionBitFields.c by changing a getHighBitsSet call to getLowBitsSet call that was incorrectly converted from the original lshr constant expression. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35348 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -5858,7 +5858,7 @@ Instruction *InstCombiner::FoldShiftByConstant(Value *Op0, ConstantInt *Op1,
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BinaryOperator::createLShr(X, ConstantInt::get(Ty, ShiftDiff));
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InsertNewInstBefore(Shift, I);
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APInt Mask(APInt::getHighBitsSet(TypeBits, TypeBits - ShiftAmt2));
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APInt Mask(APInt::getLowBitsSet(TypeBits, ShiftAmt2));
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return BinaryOperator::createAnd(Shift, ConstantInt::get(Mask));
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}
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